CN217819974U - Reflected light measurement system integrating multi-wavelength response - Google Patents
Reflected light measurement system integrating multi-wavelength response Download PDFInfo
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- CN217819974U CN217819974U CN202221191652.4U CN202221191652U CN217819974U CN 217819974 U CN217819974 U CN 217819974U CN 202221191652 U CN202221191652 U CN 202221191652U CN 217819974 U CN217819974 U CN 217819974U
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Abstract
The utility model particularly relates to a reverberation measurement system who fuses multi-wavelength response, including multi-wavelength light source, spectrum inversion unit, little the control unit and object place the platform, object place the platform be used for the support to wait to detect the object, little the control unit control multi-wavelength light source opens the LED lamp of different wavelengths in proper order, the measured object is irradiated the reverberation response that forms different wavelengths, receives the reverberation response and converts analog signal output to little the control unit into, little the control unit carries out output after the preliminary treatment to the analog signal of response detecting element output. The LED lamps with different wavelengths are used for sequentially irradiating the object to obtain a plurality of reflected light responses, the detection cost is reduced, the operation is simple, and the inversion operation of the reflection spectrum can be further carried out by utilizing the plurality of reflected light responses.
Description
Technical Field
The utility model relates to a reflection spectrum measurement technical field, in particular to reverberation measurement system who fuses multi-wavelength response.
Background
Reflectance spectra describe the relationship between light reflectance and wavelength and can be used to analyze compositional and structural differences in substances. The advantages of reflection spectroscopy are that the sample can be directly measured without damage and the requirement on the form of the sample is not high, and the sample can be solid, liquid or solid-liquid mixture and the like. Meanwhile, the reflection spectrum signal is well transmitted in the optical fiber, and remote measurement and online analysis can be realized. In recent years, the reflection spectrum is developed rapidly and widely, and relates to the fields of agriculture, food, geological survey, clinical medicine and the like. The acquisition of reflectance spectra using conventional methods requires spectrophotometers, which are costly and highly demanding in terms of operational expertise. Therefore, it is important to develop a reflection spectrum measuring apparatus with low cost and simple operation.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a reflection spectrum measuring device who fuses multi-wavelength response, the reverberation of the different wavelength LED lamps of collection that can be convenient.
In order to achieve the above purpose, the utility model adopts the technical scheme that: the utility model provides a reverberation measurement system that fuses multi-wavelength response, includes multi-wavelength light source, little the control unit and object place the platform, object place the platform be used for the support to wait to detect the object, little the control unit control multi-wavelength light source opens the LED lamp of different wavelength in proper order, the measured object forms the reverberation response of different wavelength after being shone, receives the reverberation response and converts analog signal output to little the control unit, little the control unit is to responding the analog signal of detecting element output after the preliminary treatment.
Compared with the prior art, the utility model discloses there are following technological effect: the LED lamps with different wavelengths are used for sequentially irradiating the object to obtain a plurality of reflected light responses, the detection cost is reduced, the operation is simple, and the inversion operation of the reflection spectrum can be further carried out by utilizing the plurality of reflected light responses.
Drawings
Fig. 1 is a schematic flow chart of the present invention.
Detailed Description
The present invention will be described in further detail with reference to fig. 1.
Referring to fig. 1, the utility model discloses a reverberation measurement system who fuses multi-wavelength response, including multi-wavelength light source 10, response detecting element 20, little the control unit 40 and object place the platform 30, object place the platform 30 be used for the support to wait to detect the object, little the control unit 40 control multi-wavelength light source 10 opens the LED lamp 11 of different wavelengths in proper order, the measured object is irradiated the reverberation response that forms different wavelengths, receives the reverberation response and converts analog signal output to little the control unit 40 into, and little the control unit 40 carries out the post-processing output to the analog signal of responding detecting element 20 output. The LED lamps 11 with different wavelengths are used for sequentially irradiating the object to obtain a plurality of reflected light responses, the detection cost is reduced, the operation is simple, and the inversion operation of the reflection spectrum can be further carried out by utilizing the plurality of reflected light responses.
Further, the multi-wavelength light source 10 includes a plurality of LED lamps 11, a single mode fiber 12, an optical splitter 13 and a light source multimode fiber 14, the LED lamps 11 and the single mode fiber 12 are all provided with the same number, light emitted from each LED lamp 11 is incident into the optical splitter 13 through the single mode fiber 12, the number of input ports of the optical splitter 13 is equal to the number of the LED lamps 11, each LED lamp 11 is correspondingly connected with one single mode fiber 12, all the single mode fibers 12 are connected with the optical splitter 13, and an output end of the optical splitter 13 is transmitted through the light source multimode fiber 14 and irradiates on an object to be detected. The utility model discloses in the LED lamp 11 that has set up 8 different wavelengths among the multi-wavelength light source 10, what consequently adopted here is that 1 divides 8 optical fiber branching unit 13,1 to divide 8 optical fiber branching unit 13 to the light coupling that multi-wavelength light source 10 jetted out to light source multimode optical fiber 14 all the way, just so can guarantee that the light of 8 wavelengths can both follow the surface of same angle and position directive awaiting measuring object.
Further, the response detecting unit 20 includes a receiving multimode fiber 21 and a photodetector 22, the receiving multimode fiber 21 is provided with one end located above the object to be detected for receiving the reflected light response of the object to be detected, the other end of the receiving multimode fiber 21 is connected to the photodetector 22, and the photodetector 22 converts the optical signal into a corresponding analog current signal and outputs the analog current signal to the micro-control unit 40. In practical use, the light source multimode optical fiber 14 and the receiving multimode optical fiber 21 may be fixed together in parallel and then placed directly above the object placement platform 30.
Further, the micro control unit 40 is a control system using the STM32 as a main control core, and the micro control unit 40 includes an LED control module 41 and an electrical signal preprocessing module 42; LED control module 41 uses a plurality of IO ports and common anode circuit to accomplish that the LED lamp 11 interval of controlling each different wavelength is opened and is closed, the utility model discloses in set up 8 IO ports to because the LED lamp 11 of different wavelengths need use different current drive, so adopted TDM's method here, stipulate every interval 100ms top-down start in proper order and close LED lamp 11. The electrical signal preprocessing module 42 sequentially performs I-V conversion, voltage amplification, clutter filtering, and AD sampling on the analog current signal output by the photodetector 22 to obtain a digital voltage signal representing the reflected light response, and these processes are all conventional signal processing methods, and are used for enhancing and denoising, so as to facilitate subsequent processing.
The utility model provides a product of suitable model can be selected according to the demand to photoelectric detector 22, STM32 main chip. For example, the photodetector 22 is selected from a Thorlabs APD130A2 silicon avalanche photodetector that receives incident light having a wavelength of 200-1000nm and a bandwidth of 30MHz for receiving reflected light. STM32 Main chip high performance chip STM32F103ZET6 available from Italian semiconductor.
The object placing platform 30 fixes the object to be detected through the pressing sheet clamp with adjustable size, and the height of the object placing platform 30 is adjusted through the telescopic lifting frame so as to meet the polymorphic requirement of the object to be detected and achieve the best detection effect.
Claims (4)
1. A reflected light measurement system incorporating a multi-wavelength response, characterized by: including multi-wavelength light source (10), response detecting element (20), little the control unit (40) and object place the platform (30), object place the platform (30) be used for the support to wait to detect the object, little the control unit (40) control multi-wavelength light source (10) open LED lamp (11) of different wavelength in proper order, the measured object is formed the reverberation response of different wavelength after being shone, receive the reverberation response and convert analog signal output to little the control unit (40), little the control unit (40) carry out output after the preliminary treatment to the analog signal of response detecting element (20) output.
2. The reflected light measurement system incorporating a multi-wavelength response of claim 1, wherein: the multi-wavelength light source (10) comprises LED lamps (11), single-mode fibers (12), an optical splitter (13) and light source multimode fibers (14), the LED lamps (11) and the single-mode fibers (12) are arranged in a plurality of modes and are same in quantity, light emitted by each LED lamp (11) is incident into the optical splitter (13) through the single-mode fibers (12), the quantity of input ports of the optical splitter (13) is equal to that of the LED lamps (11), and the output end of the optical splitter (13) is transmitted through the light source multimode fibers (14) and irradiates on an object to be detected.
3. The fused multi-wavelength response reflected light measurement system of claim 1, wherein: the response detection unit (20) comprises a receiving multimode optical fiber (21) and a photoelectric detector (22), one end of the receiving multimode optical fiber (21) is positioned above the object to be detected and used for receiving the reflected light response of the object to be detected, the other end of the receiving multimode optical fiber (21) is connected with the photoelectric detector (22), and the photoelectric detector (22) converts an optical signal into a corresponding analog current signal and outputs the analog current signal to the micro control unit (40).
4. The fused multi-wavelength response reflected light measurement system of claim 1, wherein: the micro control unit (40) is a control system taking the STM32 as a main control core, and the micro control unit (40) comprises an LED control module (41) and an electrical signal preprocessing module (42); the LED control module (41) uses a plurality of IO ports and a common anode circuit to control the LED lamps (11) with different wavelengths to be switched on and off at intervals; the electrical signal preprocessing module (42) sequentially performs I-V conversion, voltage amplification, clutter filtering and AD sampling on the analog current signal output by the photoelectric detector (22) to obtain a digital voltage signal representing the response of reflected light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221191652.4U CN217819974U (en) | 2022-05-17 | 2022-05-17 | Reflected light measurement system integrating multi-wavelength response |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221191652.4U CN217819974U (en) | 2022-05-17 | 2022-05-17 | Reflected light measurement system integrating multi-wavelength response |
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| CN217819974U true CN217819974U (en) | 2022-11-15 |
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| CN202221191652.4U Active CN217819974U (en) | 2022-05-17 | 2022-05-17 | Reflected light measurement system integrating multi-wavelength response |
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